  .header{
      padding: 0px;
      margin: 0px;
      height: 100px;
      min-width: 900px;
      width: 100%;
      background-color: aquamarine;
      h1{
        padding:10px;
      }
  }

  @media (min-width: 800px) {
      .nav{
         > a{
           display: none;
         }
         ul{
           li{
             display: inline-block;
           }
         }
      }
  }

  @media (max-width: 799px){
    .nav{
      > a{
        display: block;
        text-decoration: none;
        color: white;
        padding: 10px;
      }
      ul{
        float: left;
        display: none;
        position: absolute;
        &.open{
          display: block;
          position: absolute;
          z-index: 10;
        }
      }
    }
    .contain{
      position: absolute;
      z-index:-1;
    }
  }

  .nav{
      padding: 0px;
      margin: 0px;
      height: 65px;
      width: 100%;
      min-width: 900px;
      background-color: black;
      z-index: 10;
      ul{
        padding: 10px;
        margin: 0px;
        li{
          padding: 10px;
          margin: 0px 10px;
          list-style: none;
          border: solid black;
          border-radius: 10px;
          background-color: white;
          &:hover{
            background-color: blueviolet;
            box-shadow: 5px 5px 5px #888;
          }
          a{
            padding: 10px;
            margin: 0px;
            text-decoration: none;

          }
        }
      }
  }

  .contain{
    padding: 0px 0px 0px 300px;
    margin: 0px;
    min-width: 600px;
    &::after{
      content: "";
      display: block;
      clear: both;
    }
  }

  .box{
    height:600px;
    min-height: 500px;
    float: left;
  }

  .left{
     padding: 0px;
     margin: 0px;
     margin-left: -100%;
     width: 300px;
     position: relative;
     left: -300px;
     background-color: darksalmon;
     h5{
       padding:0px;
       margin: 0px;
       color: red;
     }
     .login{
       margin:0px;
       padding: 30px;
     }

  }

  .content {
    padding: 0px;
    margin: 0px;
    width: 100%;
    background-color: beige;
    overflow: auto;
  }

  .message{
    margin: 0px 5px;
    padding:0px;
    a{
      padding: 5px;
      background-color: cornflowerblue;
      text-decoration: none;
      color: black;
    }
  }

  .article{
    margin: 0px 5px;
    padding:0px;

    a {
      padding: 5px;
      background-color: cornflowerblue;
      text-decoration: none;
      color: black;
    }
  }

  .parent{
    position:relative;
  }

  .articleEdit{
     padding: 0px;
     margin: 0px;
    width: 500px;
    background-color: darksalmon;
    border: 1px solid black;
    text-align: center;
      p{
        padding: 0px 15px;
        textarea{
          resize: none;
          width: 80%;
          height: 100px;
          overflow: hidden;
        }
        input{
          width: 80%;
        }
        a{
          padding: 5px;
          margin: 10px;
          background-color: cornflowerblue;
          text-decoration: none;
          color: black;
        }
      }

  }